基于一维声栅共振场的大规模微粒并行排列的实验研究  

Experimental investigation of multiple-particle pattern based on one-dimensional grating resonance field

作　　者：齐绍富 蔡飞燕[3] 田振 黄先玉[2,3,5] 周娟 王金萍 李文成 郑海荣 邓科[2] Qi Shao-Fu;Cai Fei-Yan;Tian Zhen;Huang Xian-Yu;Zhou Juan;Wang Jin-Ping;Li Wen-Cheng;Zheng Hai-Rong;Deng Ke(College of Information Science and Eengineering,Jishou University,Jishou 416000,China;College of Physics and Mechanical and Electrical Engineering,Jishou University,Jishou 416000,China;Paul C.Lauterbur Research Center for Biomedical Imaging,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China;College of Medical,Hunan University of Medicine,Huaihua 418000,China;Suining County First Middle School,Shaoyang 422699,China)

机构地区：[1]吉首大学信息科学与工程学院,吉首416000 [2]吉首大学物理与机电工程学院,吉首416000 [3]中国科学院深圳先进技术研究院,劳特伯生物医学成像研究中心,深圳518055 [4]湖南医药学院医学院,怀化418000 [5]绥宁县第一中学,邵阳422699

出　　处：《物理学报》2023年第2期139-143,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11974372,11964011,12004409);深圳基础研究项目(批准号:JCYJ20200109110006136)资助的课题。

摘　　要：声操控微粒技术可以非接触无损伤地控制声场中的物体运动,其在精密制造、材料工程、体外诊断等领域具有广阔的应用前景.传统声操控微粒技术一般采用自由声场,如利用单个换能器或阵列换能器产生的聚焦声场、行波场或驻波场等.然而,一般单个换能器产生的声场仅能操控单个微粒;而阵列换能器的驱动系统复杂,导致操控器件成本高昂且难以微型化;因此,亟需研究新的声场形态实现多样性微粒操控.本工作中,采用单个换能器产生的平面波激发一维声栅的共振声场,实验实现了大规模泡沫微球的周期排列操控.其操控机制是由于声栅狭缝中法布里-珀罗谐振声场与声栅表面周期衍射场共振耦合,在声栅表面形成周期分布的局域梯度声场,导致微粒在平行于声栅表面受到声捕获力,在垂直于声栅表面受到指向表面的声吸引力,实现了微粒周期排列在声栅表面上.该工作为利用超声在空气中大规模排列微粒提供了理论基础和技术支持.Manipulation of particles by ultrasonic waves is a primary technique in the fields of precision manufacturing,materials engineering,and in vitro diagnosis,since it can control the motion of objects in the sound field in a contactless and noninvasive manner.In general,the free sound field,such as the focused field and the plane wave generated by a single transducer can only manipulate a single particle.While the complex field generated by a transducer array should be actuated by a complex electric control system,which makes the manipulation device expensive and cumbersome.Thus,modulated acoustic field for particle manipulation is still needed.Here,we experimental realize a one-dimensional acoustic grating to tune sound fields for the parallel pattern of multiple particles.The physical mechanism is that due to the resonance coupling between the periodic diffraction wave on the surface of the acoustic grating and the Fabry-Perot resonant sound field in the acoustic grating slit,a periodical gradient sound field on the surface of the acoustic grating is induced.Then,particles in the periodical gradient sound field can be trapped in two stable positions in one period of the grating.These concepts and realizations of particle patterns in the acoustic grating pave the way for implementing the parallel manipulation of particles in acoustic manipulation technologies.

关 键 词：声镊 声辐射力 声栅 微粒排列 

分 类 号：O42[理学—声学]